1. Tenaciously unwilling or marked by tenacious unwillingness to yield
   - obstinate, unregenerate 
2. Not responding to treatment
   "a stubborn infection"; "stubborn rust stains"
   - refractory

See also: bloody-minded [Brit], bolshie [Brit], bolshy [Brit], bullet-headed, bullheaded, cantankerous, contrarious, cross-grained, determined, disobedient, dogged, dour, hardheaded, inflexible, intractable, mulish, persistent, pertinacious, pigheaded, stiff-necked, strong-minded, strong-willed, stroppy [Brit], stubbornly, stubbornness, sturdy, tenacious, uncompromising, unyielding

Antonym: docile

Encyclopedia: Stubborn

• Pteropus hypomelanus
• pterosaur
• Pterosauria
• Pterospermum
• Pterospermum acerifolium
• Pterostylis
• pteroylglutamic acid
• pteroylmonoglutamic acid
• pterygium
• pterygoid muscle
• pterygoid plexus
• pterygoid process
• pteryla
• Ptilocercus
• Ptilocrinus
• Ptilonorhynchidae
• Ptilonorhynchus
• Ptilonorhynchus violaceus
• Ptloris
• Ptloris paradisea
• PTO
• Ptolemaic
• Ptolemaic dynasty
• Ptolemaic system
• Ptolemies